Chair



FIG. 1 is a side view of the design;

FIG. 2 is a front view of the design of FIG. 1;

FIG. 3 is a top plan view of the chair, wherein the seat cushion has been omitted for convenience of illustration.

FIG. 4 is a rear view of the design.

The side of the chair not shown is a mirror image of the side shown. 

The ornamental design for a chair, substantially as shown and described. 